(Essay found in Nesselroade & Grimm, 2019; pgs. 379 – 380) Ronald Fisher (1890–1962) was born in England. He is considered a child prodigy. His daughter and biographer offers the following story. At about age three when he had been set up in his high chair for breakfast, he asked: “What is a half of a half?” His nurse answered that it was a quarter. After a pause, he asked, “And what’s a half of a quarter?” She told him that it was an eighth. There was a longer pause before he asked again, “What’s a half of an eighth,